Biology 0610 · IGCSE · Sexual reproduction in humans

Sexual reproduction in humans — practice question

The table presents the percentages of sperm showing different abnormalities in samples taken from a person with normal fertility and from two people with low fertility. What are the causes of low fertility in person P and person Q?

  • Aperson P: too many sperm cannot digest jelly coat of egg cell; person Q: too many sperm cannot digest jelly coat of egg cell
  • Bperson P: too many sperm cannot digest jelly coat of egg cell; person Q: too many sperm cannot move to oviduct
  • Cperson P: too many sperm cannot move to oviduct; person Q: too many sperm cannot digest jelly coat of egg cell
  • Dperson P: too many sperm cannot move to oviduct; person Q: too many sperm cannot move to oviduct

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